Xenserver / linux software raid

I want my Storage Repository (SR) run under the software RAID (RAID1). My xenserver version 6.5. XenServer 6.5 do not load soft raid kernel modules on boot. To load soft raid manually run :

modprobe raid1

To load the soft raid module on boot, we can follow this steps : http://discussions.citrix.com/topic/360943-software-raid-mdadm-on-xenserver-65-unexpected-failure/?p=1855912

To build the RAID array :

 
mknod /dev/md1 b 9 1

mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1

/dev/sdb1

and

/dev/sdc1

is using linux raid autodetect as the partition type. Use fdisk to create those partition.

To check the RAID building process :

cat /proc/mdstat

reference :

•  https://staff.ie.cuhk.edu.hk/~sfluk/wordpress/wp-content/uploads/2010/06/Software-RAID-on-XenServer.doc
• http://discussions.citrix.com/topic/360943-software-raid-mdadm-on-xenserver-65-unexpected-failure/?p=1855912

Internet access for android on vmware

If you download android x86 virtual appliance (http://www.osboxes.org/android-x86/) or installing android x86 manual to your vmware, you can give an internet access to the device

1. Add Network Adapter, with NAT as the network adapter type
2. Don't start your vm, edit the .vmx file, add / edit this line :

ethernet0.virtualDev = "vlance"

3. Now start your vm and you should can browsing from the android vm

reference:
https://lkubaski.wordpress.com/2012/08/15/running-android-on-vmware-player-with-networking-enabled/

Grails / GORM database mapping Money data type on Microsoft SQL Server

import java.math.BigDecimal
class Cloth {
    ...
    BigDecimal price
    ...
    static mapping = {
        price sqlType: "money"
    }
}

reference : https://msdn.microsoft.com/en-us/library/ms378878(v=sql.110).aspx
remember, grails is java too :D

Make uninitialized disk using diskpart

Warning this command will erase all of data on the disk!!!

1. run cmd
2. type : diskpart
3. type : list disk
4. select the disk you want to clean / uninitialize, in this example : select disk 1
5. clean
6. done

This steps are useful if we want to change the disk partition type (GPT or MBR or other)

Grails Spring Security no password encoding

http://stackoverflow.com/questions/8465016/spring-security-no-password-encoding

t's a really really bad idea in general, but if you have a use case for it then it is doable. Override the passwordEncoder bean in grails-app/conf/spring/resources.groovy:

import org.springframework.security.authentication.encoding.PlaintextPasswordEncoder

beans = {
   passwordEncoder(PlaintextPasswordEncoder)
}

MySQL Export Query Result to CSV / text file

SELECT order_id,product_name,qty
FROM orders
INTO OUTFILE '/tmp/orders.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n'

MikroTik PPTP Server, client cannot access LAN devices

Don't forget to set up your interface for proxy-arp

Interfaces -> Ether2 ( your interface ) -> ARP : Proxy-arp